Hi Dev-Team
I'm working on a iPXE solution and unfortunately I've run into trouble with the
DHCP part. I've checked the forum and found a unanswered question:
" So how can I ensure that iPXE uses #define BOOTP_FL_BROADCAST 0x8000 when
doing DHCP?"
This discribe my problem exactly.
See the tcpdump here:
***********************************************************************************************************************
Test with standard PXE:
=======================
[root@ ~]# tcpdump -lenx -s 1500 port bootps or port bootpc | dhcpdump
tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on eth0, link-type EN10MB (Ethernet), capture size 1500 bytes
TCPdump 3.8.x output
TIME: 09:27:32.866541
IP: > (00:0c:29:fb:2c:f5) > (Broadcast)
OP: 1 (BOOTPREQUEST)
HTYPE: 1 (Ethernet)
HLEN: 6
HOPS: 0
XID: 2afb2cf5
SECS: 4
FLAGS: 7f80 <<<=== !
Test with iPXE:
===============
listening on eth0, link-type EN10MB (Ethernet), capture size 1500 bytes
TCPdump 3.8.x output
TIME: 09:29:49.850330
IP: > (00:0c:29:fb:2c:f5) > (Broadcast)
OP: 1 (BOOTPREQUEST)
HTYPE: 1 (Ethernet)
HLEN: 6
HOPS: 0
XID: d63ee953
SECS: 4
FLAGS: 0 <<<=== !
***********************************************************************************************************************
I'm using the newest release of iPXE and working in a VMWare environment. Here
is my included ipxe-script:
#!ipxe
echo
echo +----- RCH adjusted area -----+
echo
dhcp net0 || echo DHCP error
set timeout 5000
:start
menu iPXE boot menu
item --gap -- ------------------------- select desired task
------------------------------
item --default --key x exit Exit iPXE and continue BIOS boot
item --key i install Install/reinstall OS
item --key r rescue Boot a rescue system
item --gap -- ------------------------- Advanced options
-------------------------------
item --key c config Configure settings
item shell Drop to iPXE shell
item reboot Reboot computer
item
choose --timeout ${timeout} selected || goto cancel
set timeout 0
goto ${selected}
:cancel
echo You cancelled the menu, dropping you to a shell
:shell
echo Type exit to get the back to the menu
shell
set timeout 0
goto start
:reboot
reboot
:exit
exit
:config
config
goto start
:install
echo
echo Please type the hostname
read hn
set hostname ${hn}
chain tftp:// xxx.xxx.xxx.xxx /pxelinux.cfg/${hn} || goto menu_ip
:rescue
chain tftp:// xxx.xxx.xxx.xxx /pxelinux.cfg/rescue || shell
:menu_ip
echo
echo Please type the IP adresss
read ip
set net0/ip ${ip}
chain tftp://xxx.xxx.xxx.xxx/pxelinux.0 || shell
***********************************************************************************************************************
Without this flag our firewall block such traffic - and unfurtunately it's not
option to change something in the firewall.
I'm not a C-Guru and tried to find the problem insite the src c-files but
without success. Could you give me an advice how to ensure that the "FLAGS
7f80" is also set with iPXE?
Kind Regards
Jürgen Brunk
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